Enhance your AC500 PLC system with the robust and versatile ABB ci521-modtcp:s500 bus module. Designed for demanding environments, this module offers seamless Modbus TCP communication alongside comprehensive analog and digital I/O capabilities. Ideal for industrial automation and remote monitoring in harsh conditions, the ci521-modtcp:s500 ensures reliable performance and compliance with industry standards.
The ci521-modtcp:s500 provides a powerful combination of communication and control in a single, rugged package. Its Modbus TCP compatibility simplifies integration with other Modbus devices, while the diverse I/O options allow for flexible monitoring and control of various sensors and actuators. The module’s ability to withstand extreme conditions makes it the ideal choice for outdoor applications and challenging industrial environments.
Key Features
Modbus TCP communication interface
4 Analog Inputs (AI) supporting voltage, current, and RTD (1-wire & 2-wire)
2 Analog Outputs (AO)
8 Digital Inputs (DI) - 24VDC
8 Digital Outputs (DO) - 24VDC/0.5A
12-bit signed resolution for analog signals
Designed for extreme conditions and outdoor environments
Seamless integration with ABB AC500 PLC systems
Applications
Remote monitoring and control systems
SCADA systems integration
Industrial process automation
Outdoor environmental monitoring
Frequently Asked Questions
This module supports Modbus TCP for reliable industrial communication.
The digital outputs are rated for a maximum of 0.5A at 24VDC.
While designed for harsh environments, consult the product datasheet for specific certifications related to hazardous locations.
Technical Specifications
Part Number
CI521-MODTCP:S500
Communication Protocol
Modbus TCP
Analog Inputs
4
Analog Outputs
2
Digital Inputs
8 (24VDC)
Digital Outputs
8 (24VDC/0.5A)
Power Supply
24VDC
HS Code
85389091
Country of Manufacture
Germany
Part Number
CI521-MODTCP:S500
Communication Protocol
Modbus TCP
Analog Inputs
4
Analog Outputs
2
Digital Inputs
8 (24VDC)
Digital Outputs
8 (24VDC/0.5A)
Power Supply
24VDC
HS Code
85389091
Country of Manufacture
Germany
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
What product ranges do you supply
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Can you help specify the correct part?
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...